Log response header value

hi, is it possible to log a response header in the accesslog ?

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,24401,24401#msg-24401

On Fri, Nov 20, 2009 at 08:13:27AM -0500, vlado wrote:

hi, is it possible to log a response header in the accesslog ?

$sent_http_HEADER_NAME